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A: Fachverband Atomphysik

A 4: Präzisionsmessungen und Metrologie 1

A 4.2: Vortrag

Montag, 12. März 2012, 10:45–11:00, V47.02

First gravity measurements using the mobile atom interferometer GAIN — •Christian Freier, Malte Schmidt, Alexander Senger, Matthias Hauth, Vladimir Schkolnik, and Achim Peters — Humboldt-Universität zu Berlin, Institut für Physik, AG Optische Metrologie, Newtonstr. 15, 12489 Berlin

GAIN (Gravimetric Atom Interferometer) is a mobile gravimeter, based on interfering ensembles of laser cooled ⁸⁷Rb atoms in an atomic fountain configuration. After introducing the working principle of the interferometer, we present the results of the latest laboratory gravity measurement and progress made in controlling systematic effects.

The high-precision interferometer has reached a sensitivity of 2× 10⁻⁸g/√Hz in its first measurement and is designed for a target accuracy of a few parts in 10¹⁰ g. Finally, we report on the next steps towards a mobile gravimeter for field use.